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(a+1)/b , (b+1)/c , (a+1)/b are integers (2018 Auckland MO J5)

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November 14, 2021
number theoryIntegers

Problem Statement

Find all possible triples of positive integers, a,b,ca, b, c so that a+1b\frac{a+1}{b}, b+1c\frac{b+1}{c} and c+1a\frac{c+1}{a} are also integers.